Like mayor twin, Castro stands out

Lisa Krantz/San Antonio Express-News

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Mayor Julian Castro, right, and his brother, Congressional candidate Joaquin Castro, left, are interviewed by CBS News National Correspondent Lee Cowan as they tape a segment for the CBS Evening News at Rosario's in San Antonio on Friday, August 24, 2012. The segment will air the night Castro gives the keynote speech at the Democratic National Convention,

Mayor Julian Castro, right, and his brother, Congressional candidate Joaquin Castro, left, are interviewed by CBS News National Correspondent Lee Cowan as they tape a segment for the CBS Evening News at Rosario's in San Antonio on Friday, August 24, 2012. The segment will air the night Castro gives the keynote speech at the Democratic National Convention,